From Wikitravel

Some of where I've been:

Americas

• United States duh
  • California
    • Marin County -- born and raised
  • Connecticut
  • Nevada
  • Utah
  • New York
  • New Jersey
  • Florida
  • Maine
  • Colorado
  • Texas
  • Hawaii -- lived in Kahala, Oahu

• Canada
  • Montreal
  • Quebec City
  • Gaspé Peninsula
  • Saguenay-Lac-St-Jean
  • Vancouver
  • Prince Edward Island
  • Ottawa
  • Toronto

• Mexico
• Barbados
• British Virgin Islands

Europe

• Switzerland: Geneva -- lived there for 3 years,
• France
• Italy
• Spain: Barcelona -- too many times
• Germany: Munich, Lübeck, Kiel
• Portugal: Lisbon-- lived there for a couple of months
• Amsterdam -- I don't think it's fair to say I've been to the Netherlands as I've never managed to make it outside of walking distance of the Dam
• Prague
• England: London, Wales, Scotland
• Ireland -- OK, just Dublin
• Monaco
• Vatican City
• Denmark: Copenhagen, Odense
• Sweden: Visby
• Estonia: Tallinn

• Russia: St. Petersburg (Russia)

Asia

• Cambodia
• Bali
• Laos
• Malaysia
• Nepal
• India -- Mostly Rajastan
• Japan
• Singapore
• Thailand
• Vietnam